Reducing Indoor Noise Levels Using People’s Perception on Greenery

Mediastika, Christina E.; Binarti, Floriberta

doi:10.2478/rtuect-2013-0003

Cited by 5 publications

(5 citation statements)

References 12 publications

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“…Regarding attenuation loss, the curve changes from 20 dB.m −1 at 180 Hz to 250 dB.m −1 at 1000 Hz in the case of coir dust and from 50 dB.m −1 at 180 Hz to 100 dB.m −1 at 1000 Hz in the case of perlite sample. Conversely for foliage sample, these losses are very weak and negligible compared to the substrates.These results conrm the insignicant dierence of sound level in presence and absence of leaves demonstrated by Mediastika and Binarti[39].…”

supporting

confidence: 86%

An optimal dimensioning method of a green wall structure for noise pollution reduction

Attal

Dubus²,

Leblois

et al. 2021

Building and Environment

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This paper concern the optimization of a multilayered green wall structure including substrate and foliage in order to reduce as much as possible backward noise reection and forward transmission from the wall. Each component involved in the wall structure is fully characterized experimentally to get its tranfer matrix. Simulation demonstrated that foliage layer superimposed to substrate layer doesn't aect the transmission losses but contributes greatly to the increase of return losses of the green wall structure.To acheive the best performances in terms of return and forward losses as well as frequency bandwidth, the methods of optimization are discussed including selection of types of materials, thicknesses, arrangement of layers as parameters.

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supporting

confidence: 86%

An optimal dimensioning method of a green wall structure for noise pollution reduction

Attal

Dubus²,

Leblois

et al. 2021

Building and Environment

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“…But apart from an effect on the (objective) noise level, plants may also have an effect on the experienced noise annoyance. The same objective noise level has been shown to result in less noise annoyance if plants are present (Mediastika and Binarti, 2013). A similar type of effect has been reported to occur with regard to room temperature.…”

Section: Introductionmentioning

confidence: 52%

Effects of indoor plants on office workers: a field study in multiple Dutch organizations

2023

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In the period 2019–2020, the effect of plants in the workspace on (a) the physical indoor climate, (b) the perception of the workspace by office workers, and (c) their health, well-being and functioning was investigated in nine organizations. This paper reports the outcomes of the latter part. A conceptual model describing the short-term, medium and long-term effect of plants on people was formulated, containing 18 outcome variables. A “Before After Control Impact” quasi-experimental research design was used. A control workspace and an intervention workspace were selected in each of the organizations. A pre-measurement was conducted in both. Correlational analyses, based on the pre-measurements in all organizations and workspaces, confirmed the associations proposed by the conceptual model to a large extent. After placing plants in the intervention workspace, a maximum of two post-intervention measurements were conducted (due to COVID-19 not in all nine organizations), the last one at least 4 months after the introduction of the plants. Overall significant effects were found on complaints about dry air (fewer), the sense of privacy (higher), the attractiveness of the workspace (higher), satisfaction with the workspace (greater) and having a health-related complaint, especially when at work (fewer). The first three effects were already observed in the analyses only including the first post-measurement. The latter two effects only showed up in the analyses including two post-measurements. No direct effect of the plants could be demonstrated on the 13 other outcome variables. The observed effects mainly concern outcome variables that are positioned at the beginning of the proposed causal chain, starting with plants and ending with mental health, absenteeism and job satisfaction.

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“…This paper applied tannin extracted from agricultural waste plantation, S. trifasciata. This plant is easily grown in residential garden [36] or as home ornament [37], but also harvested by farmer due to economic benefit [38]. Tannin comprised in S. trifasciata, especially from leaves part contains condensed and hydrolyzed tannins.…”

Section: Results and Discussion Immobilized Tannin On Carbonmentioning

confidence: 99%

Immobilized Tannin from Sanseviera trifasciata on Carbon as Adsorbent For Iron(II) in Polluted Water Source

Arif

Rumhayati

Masruri

2016

J. Pure App. Chem. Res.

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The organic-agricultural waste resulted from local farmer or community gardening recently paid public attention. The presence and easily grow of "Lidah Mertua" or Sanseviera trifasciata being focus investigation for its prospecting application. It was reported that the leaves contain some phenolic compound including tannin from aqueous extraction. This paper revealed recent investigation application of isolated tannin from leave part for modification of carbon. The previous paper published that carbon was able to adsorb some toxic heavy metals. However, it has some limitation including lower capacity adsorption. Impregnation of tannin-isolated from S. trifasciata leaves was proposed able to improve the carbon functionality, physical appearance, pores size, and its adsorption capacity. Our investigation discloses that modified carbon with tannin was able to adsorb iron(II) between 14-18% of its weight. It activity improved to 20% adsorption for 30 min shaking. The working pH adsorption ranges between 3 and 8, and the optimum adsorption is reached after pH 6 (above 60% adsorption occurred). The Langmuir and Freundlich adsorption mechanism model also disclosed that mechanism of iron(II) adsorption on the adsorbent tannin-immobilized on carbon. The real test using community well drilling water source also gave an important finding on the concentration of iron(II) contained on water source even sample is taken from the single side.

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Reducing Indoor Noise Levels Using People’s Perception on Greenery

Cited by 5 publications

References 12 publications

An optimal dimensioning method of a green wall structure for noise pollution reduction

An optimal dimensioning method of a green wall structure for noise pollution reduction

Effects of indoor plants on office workers: a field study in multiple Dutch organizations

Immobilized Tannin from Sanseviera trifasciata on Carbon as Adsorbent For Iron(II) in Polluted Water Source

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